Ram ventilation, Biology

Ram Ventilation

Some fish do not use pumping action for gill ventilation. It has been known for long that large tunas cannot be kept alive in captivity unless they are put in circular tanks where they can swim continuously. The fish swim with their mouths partly open and there are no visible breathing movements. Water flows continuously over their gills. This is known as ram ventilation.

It is now known that many fish breathe by pumping at low speed and change to ram ventilation at high speed. In this case the work of breathing is transferred from the muscles of the opercular pump to the muscles of the body and tail. However, ram ventilation is more economical as far as energy consumption is concerned than opercular pumps at high rates required for fast swimming.

Posted Date: 1/15/2013 6:56:42 AM | Location : United States







Related Discussions:- Ram ventilation, Assignment Help, Ask Question on Ram ventilation, Get Answer, Expert's Help, Ram ventilation Discussions

Write discussion on Ram ventilation
Your posts are moderated
Related Questions
INTRODUCTIO N - Endocrinolog y - Study of endocrine glands, hormones and their effects. Thomas Addison - Father of endocrinology. Described hormonal disease in 1855 kn

Antimicrobial Prophylaxis - Controversial The need for prophylaxis in breast surgery, herniorraphy and other "clean" surgical procedures has been controversial. Medical Letter

What is the role of water in metabolism and photosynthesis I

Why are trees green? It is because leaves have chloroplasts, which have a green pigment, which also have chlorophyll in them. They are used for conducting photosynthesis, which

Define the Physical activity level? Physical activity level (PAL) is defined as the total energy required over 24 hours divided by the energy needed for basal metabolism over 2

What is Fermentation ? Fermentation is a process used by anaerobic organisms and certain cells of aerobic organisms, such as muscle cells deprived of oxygen, to obtain addition

Nursing Process History Character of onset and duration of cough, sputum production, dyspnea, pain in right upper quarant.  Smoking history.  Past illness -

Would you expect the muscle fibers of the tongue to be striated or smooth? What about the muscle of the diaphragm/ Explain your answer.

A number of protein-coding genes are active in all cells and are required for so- called house-keeping functions such as the enzymes of glycolysis, the citric acid cycle and the pr

Protein Protein: The requirement of protein is increased in typhoid, as  there  is  a massive tissue loss. Thus, the protein intake should be increased above the normal of  lg/